Improvement in pumps



carinii .Seite JOHN B. "SIVERTSO N, OFCHIGAG O, ILLINOIS.

Letters Patent No. 109,955, dated December 6, 1870.

IMPROVEMENT IN PUMPS.

The Schedule referred to in these Letters Patent and mel-ring part of the same.

To alla-710m 'item1-y concern:

Be it known that I, Joris B. Srvnnfrsos, of Ghicago, in the county of Cook and State of Illinois, have invented a new and improved Ships Pump; and I do hereby declare the following to be a full, clear, and exact description thereof, which will enable others skilled in the art to which my invention appertains to make and use the same, reference being had tothe accompanying drawing forming part of this specitication.

Figure lis a side elevation of my improved pump.

Figure 2 is a sectional side elevation, showing the constructionot' the valves and valve-chambers.

`Figure 3 is a top plan view of the pump, with the pistons removed and one of the cylinders' closed by a cover.

Figure 4 is a transverse vertical section of Athe plunger or piston.

4 Similar letters of reference indicate corresponding parts in the-several figures of the drawing.

Myinvention has for its object to improve the construction and operation of ships pumps; and to this end,

It consists in the construction and combination of parts hereinafter described.

In the accompanying drawing- A is the base ofthe pump, lmounted upon supports B, and supporting .two vertical cylinders C securedthereto by-holts and nuts.

The cylinders are connected, at theirupper ends, by a trough, D, having a lateral discharge-spout, E.

The base Ais cast hollow, to communicate with the cylinders, and extends laterally to the rear of the latter, where it rises centrally, to form the vertical case, F, for the valves. G G are two vertical partitions, extending transversely of the valve-case, near the oe'nter,fto divide the same into two valve-chambers, H H, one upon each side of the central water-way I.

IVithiu the chambers the valves J are hung, by their upper edges, from the case F, in such a manner, as to close .the ports K in the upper ends of the partitions, as shown in rig. 2.

The water-way I is connected, at its bottom, by a suitable pipe, with the well of the ship, and the water enters the pump-cylinders through the base A and valve-chambers, as indicated by the arrows in Iig. 2.

. The cover'L for the case F is provided, at opposite ends, with lugs m, adapted to it upon the screw-bolts ln, atlxed to the case by means of lateral slots formed in said lugs.

The cover is hclu-,mplace by the screw-nuts o, as' shown.

By loosening the nuts, the cover L is readily removed from the case, to permit access to the valves and valve-chambers.

Pumps of this'class, as heretofore constructed, have the valves arranged in the lower ends of the cylinders, beneath the pistons, and are accessible only by removing the pistons or other portions of the pump. B v my invention this diiculty is entirely avoided, as the valvesare reached under all circun'istances by simplv removing the cover Il.

rlhe center ofthe cover L is provided with an opening directly over the water-way I, which opening is closed by a swinging cover, P.

By this arrangement'a sounding-rod can be introduced within the well of the lship to ascertain the vdepth of water without removing the handle or the pistons from the cylinders, as is commonly the case.

"lo effect this result it is only necessary to swing oli0 the cover P and insert the sounding-rod through the water-way I.

(1,)- is a metal plate, securely bolted to the top of. the trough D, between the cylinders,`and is formed with two nprights, which furnish bearings for the rookshaft It. i

Upon this shaft is cast, or to it is attached, a segmental gear, S, which is adapted to engage with the internally-toothed rim T, axed tov the arms U,

through which thepnmp-handle or brake passes.

The arms U are supported upon a rock-shaft, V, also having its bearings in the uprights beneath the shaft R. y

To one face of' the segmental gear S is attached, centrally, the working-beam W, to which the pistourods are pivoted in the usual manner.

By operating the handle or brake the arms U are vibrated and communicate motion, through the gear- `ing and-working-beam, to the piston-rods.

As the toothed rim and segmentalgear describe arcs of different radii, the former being the longest, it is evident that a short strokeof the handle or brake will communicate a longer stroke to the ends of the working-beam, and, consequently7 a long stroketo the pump-pistons that is to say, when the working-beam stands at an angle of about forty-fivedcgrees, the pump-handle would stand at about twenty-two derees. g The object of this connection isvto avoidthe long stroke of the pump-handle necessary t0 Operate the pistons in pumps having the piston-rods connected directly to the handle. By my invention in this respect,

HIerefore, the operation of pumping is rendered Iless laborious and fatiguing.

The pistons are each formed of a block, X, having exterior beveled edges, and with a central opening for the passage of water.

Y is the piston-packing, formed of a straight strip of leather or other suitable material; and

Z is a metal ring, having an interior bevel adapted to t over and conform to the bevel of the block X.

The packing is placed around the beveled edge of the block, and the ring Z placed over the lower edge ot' the packing, and is clasped firmly in position' by means of nuts upon the arms A' of the piston-rod, which pass through both the block X and ring Z, as sho'wn in fig. 4.

By these means the packing is readily' applied and removed from the pistom Strips of ordinary leatherare employed forpacking, instead of the pressed material new in use, whereby pumps cau be repaired upon shipboard with ease and expedition, instead ofthe labo`r and skill new required by the use of pressed material.

Bythis arrangement, also, the packing is made adjustable upon the block X to fit the cylinders snugly.

B is the pistonvalve, fbrmed of a flat piece of metal, packed upon the'under side with leather orother suitable material.

The valve is hinged to the block X by means of a lateral pin, C', in the former entering avertical link, D', affixed to the latter, as shown.

This method of attachment permits the vertical play of the valve at the hinge to accommodate dierent thicknesses of paekingas the latter is liablev to vary in thickness when replaced by repairs.

Without this connection or hinge the valve would not at all times i'it closely upon its seat without great care being exercised in repairing the packing.

The latter is held upon the under side of valve by means of a plate, e, Which is provided lwith a screw, f', passing through the valve and packing, to receive the nut g'.

The packing is also prevent-ed from lateral displacement by passing the bent ends of' the plate through the packing and valve, as shown in g. 4.

My improved pump does not require priming, as the ,base A is, at all times, filled with water.

NVhen the pump is not in operation, as in port, or to exclude snow and ice, the pistons are removed by detaching the piston-rods from the working-beam, and the cylinders closed by the detachable coversH.

These covers, ii1-co1n1ection-with the plate Q, effectually close the top ofthe cylinders and trough D, as will be seen by reference to iig. 3 of the drawing.

vA cover may be also applied to the spout E, if 'desired.

If the movement ofthe valves should be found unsteady in the practical operation ot my im proved pump, a pendulum may be attached to the rock-shaft or fulcrum of the lever operating the valves, thus producing a steady motion and an easy operation ot' the moving parts.

Having thus described my invention,

'What I claim as new, and desire to secure by Let'- ters Patent, is-

l. The arrangement upon the plate Q', with relation to eachother, of' the segmental gear S, internally-toothed rim T, beam WV, and the pump-brake, substantially as described.

2. The water-base-A, constructed as described, to support the cylinders, and form the case F, containing the valve-chamber H and water-way I, in rear or upon one side of said cylinders, substantially as and for the purpose specified.

3. The valve B', having its packing secured in place by means of the plate e, screw f', and nut g', and hinged to the piston in such a manner as topermit vertical play at the hinge, substantially as described, for the purpose specified.

4. In combination with the case F, the cover L,

having the cent-ral covered opening, and adapted for removal, in the manner described, to permit access to the valve-chambers H and water-way '1, as and for the purpose specified.

' JOHN B. SIVERTSON.

Witnesses;

G. H.. FRosT, E. A. ELLsWoRTH. 

